285 



and a little enlarged at the end. The teeth nearly of a size, 

 from twenty-five to twenty-seven on each side below, and 

 twenty-seven or twenty-eight above ; the two first and the 

 two fourth of the lower jaw pass through grooves on the 

 outsides of the upper jaw. 



The student, it is presumed, will be aided in his inquiries 

 respecting the fossil remains of the saurian animals in 

 general, by reference to the following memoranda of the 

 most prominent peculiarities observable in the skeleton of 

 the crocodile, as most usefully instanced by Cuvier in the 

 crocodile a losange ; observing, that the sutures and the 

 number of the bones of the head are the same jn every 

 species, although their figures may be changed in conse- 

 quence of the difference in the form of the head itself. 



The most anterior of the bones of the head are the 

 intermaxillary bones, which hold the fore-teeth. At the 

 junction of these bones, in their upper part, is the opening 

 of the nostrils, and in their lower part are the incisory 

 holes. The maxillary bones are immediately behind 

 these, each extending in a long apophysis which holds 

 the last teeth, and is inserted between the jugal bone 

 and an unnamed bone situated in the sides of the palate. 

 The anterior parts of the palate bones are received be- 

 tween the maxillary bones ;, and the posterior parts, 

 having widened a little, are applied to the anterior part of 

 the internal pterygoidal apophyses which here form the 

 lower part of the nasal canal, and, becoming extended, form 

 a wide horizontal and triangular plate, at the posterior border 

 of which the nasal canal opens. The unnamed bones on 

 each side, already alluded to, join the lateral margins of this 

 surface, and are united obliquely to the dental apothyses of 

 the maxillary bone, leaving in the roof of the mouth, on 

 each side, a large oval opening, surrounded by the bone 

 already mentioned, which is considered by Cuvier as 

 the external pterygoidal apothysis, by the maxillary, the 



